feat: Models Library - browsable catalog of transcription models

[nikolaykolibarov]

Summary

Add a dedicated "Models Library" section to Yap that provides a browsable, searchable catalog of available transcription models from multiple providers.

Problem

Currently, users select a model during onboarding or in Settings, but:

• The model selection is basic (just a list of names and sizes)
• No detailed information about model capabilities, speed, or accuracy
• No easy way to discover and compare models from different providers
• Users can't easily see what models are available vs. downloaded

Proposed Solution

A new "Models Library" page in the sidebar that allows users to:

Core Features

• Browse all available models in a list/grid view
• Filter by provider (Local Whisper, OpenAI, future providers)
• Search models by name
• View model details including:
  • Type (voice transcription, text, etc.)
  • Speed rating (visual indicator)
  • Accuracy rating (visual indicator)
  • Best use case (e.g., "Real-time transcription", "Medical terminology")
  • Language support (English only vs. multilingual)
  • Size (for downloadable models)
  • Cloud vs. Offline indicator

Model Actions

• Download local models directly from the library
• Favorite/star models for quick access
• Set as active model with one click
• Delete downloaded models to free space

UI Elements

• Search bar at top
• Provider filter dropdown
• List view with columns: Model name, Type, Speed/Accuracy, Cloud/Offline, Download status
• Detail panel when a model is selected showing full specs
• Download progress indicator for local models

Additional Context

This feature would make Yap more discoverable and help users find the best model for their use case, especially as more providers/models are added in the future.

Tasks

• Design Models Library UI mockups
• Create Models Library page component
• Implement model metadata schema (speed, accuracy, use case, etc.)
• Add provider filtering
• Add search functionality
• Implement model detail view
• Add download/delete actions for local models
• Add favorite/star functionality
• Integrate with Settings (set active model)